/*
*  Copyright 2019-2020 Zheng Jie
*
*  Licensed under the Apache License, Version 2.0 (the "License");
*  you may not use this file except in compliance with the License.
*  You may obtain a copy of the License at
*
*  http://www.apache.org/licenses/LICENSE-2.0
*
*  Unless required by applicable law or agreed to in writing, software
*  distributed under the License is distributed on an "AS IS" BASIS,
*  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*  See the License for the specific language governing permissions and
*  limitations under the License.
*/
package me.zhengjie.service.impl;

import me.zhengjie.domain.Follow;
import me.zhengjie.utils.ValidationUtil;
import me.zhengjie.utils.FileUtil;
import lombok.RequiredArgsConstructor;
import me.zhengjie.repository.FollowRepository;
import me.zhengjie.service.FollowService;
import me.zhengjie.service.dto.FollowDto;
import me.zhengjie.service.dto.FollowQueryCriteria;
import me.zhengjie.service.mapstruct.FollowMapper;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import me.zhengjie.utils.PageUtil;
import me.zhengjie.utils.QueryHelp;
import java.util.List;
import java.util.Map;
import java.io.IOException;
import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import java.util.LinkedHashMap;

/**
* @website https://el-admin.vip
* @description 服务实现
* @author ...
* @date 2020-11-08
**/
@Service
@RequiredArgsConstructor
public class FollowServiceImpl implements FollowService {

    private final FollowRepository followRepository;
    private final FollowMapper followMapper;

    @Override
    public Map<String,Object> queryAll(FollowQueryCriteria criteria, Pageable pageable){
        Page<Follow> page = followRepository.findAll((root, criteriaQuery, criteriaBuilder) -> QueryHelp.getPredicate(root,criteria,criteriaBuilder),pageable);
        return PageUtil.toPage(page.map(followMapper::toDto));
    }

    @Override
    public List<FollowDto> queryAll(FollowQueryCriteria criteria){
        return followMapper.toDto(followRepository.findAll((root, criteriaQuery, criteriaBuilder) -> QueryHelp.getPredicate(root,criteria,criteriaBuilder)));
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public FollowDto findById(Integer followId) {
        Follow follow = followRepository.findById(followId).orElseGet(Follow::new);
        ValidationUtil.isNull(follow.getFollowId(),"Follow","followId",followId);
        return followMapper.toDto(follow);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public FollowDto create(Follow resources) {
        return followMapper.toDto(followRepository.save(resources));
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void update(Follow resources) {
        Follow follow = followRepository.findById(resources.getFollowId()).orElseGet(Follow::new);
        ValidationUtil.isNull( follow.getFollowId(),"Follow","id",resources.getFollowId());
        follow.copy(resources);
        followRepository.save(follow);
    }

    @Override
    public void deleteAll(Integer[] ids) {
        for (Integer followId : ids) {
            followRepository.deleteById(followId);
        }
    }

    @Override
    public void download(List<FollowDto> all, HttpServletResponse response) throws IOException {
        List<Map<String, Object>> list = new ArrayList<>();
        for (FollowDto follow : all) {
            Map<String,Object> map = new LinkedHashMap<>();
            map.put("关注人编号 读者编号 ", follow.getReaderId());
            map.put("被关注人编号 读者编号 ", follow.getFollowerId());
            map.put("是否启用 1启用 0未启用", follow.getIsEnable());
            list.add(map);
        }
        FileUtil.downloadExcel(list, response);
    }
}